Mold for molding building-blocks.



PATENTE-D 00T. 16, 1906.

P. MGM. SAWYER. MOLD POR MOLDING BUILDING BLOCKS.

APPLICATION FILED MAY 7. 19GB.

2 SHEETS-SHEET l.

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@XM/kwam@ PATENTED OCT. 16, 1906.

F. MGM. SAWYER. MOLD .FOR MOLDLNG BUILDING BLOCKS.

APPLICATION FILED MAY 7. 1906.

2 SHEETSSHEET 2.

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UNITED STATES PATENT oFFIcE.

FRANK MCMURRAY SAVVYER, OF CHARLOTTE, NORTH CAROLINA. MOLD FORIVIOLDNG BUILDING-BLOCKS.

Patented Oct. 16, 1906.

applicati@ nel May 7, 1906. 'sem1ii'0.s15,597`.

T all whom 715 may concern: Be it known that I, FRANK MCMURRAY SAWYER, a citizen of the siding at Charlotte, in the county of Mecklenburg and rState of North Carolina, have inn "and it consists in the construction, combination, and arrangement of devices hereinafter described and claimed.

The object of myinvention is to provide an improved mold, which com rises a moldbox the floor or bottom of whic forms one of the outer faces of each of a plurality of moldremovable partition-plates to divide the box into series of mold-spaces and to form the outer end faces of the molded blocks, and removable mold-plates for subdividing the spaces between the partitionplates into individual mold-chambers for the respective molded blocks, each of said moldplates being provided on one side with a spacer and core-former to form the inner surfaces of such molded blocks and appropriately space such mold-plates apart.

In the accompanying drawings, Figure 1 is a top plan view of a mold embodying my improvements. Fig. 2 is a vertical longitudinal sectional view of thefsame. Fig. 3 is a vertical transverse sectional view of the same. Fig. 4 is a detail perspective view showing the construction of themold-plates. Fig. 5 is a sectional view similar to Fig. 3, showing a modification. Fig. 6 is a top plan view of another modification. Fig. 7 is a transverse sectional view of the same. Fig. 8 is a similar view on a planeat right angles to that of Fig. 7, and Fig. 9 is a detail perspective view of one of the core-molds'.

The mold-box 1 may be of any suitable size and may be made of any suitable material. It has a floor or bottom 2, sides,3, and

stays 4,. which connectthe sides together.

Partition-plates 5 are placed between' the sides at suitable distances apart and divide the box into mold-spaces, in each ofwhich a number of blocks may be molded,- as-hereinafter stated. The'said mold-spaces are sub-f divided into individual mold-chambers for the several ,blocks bymo1dplates 6, which United States, re-

Iare placed between the pairs of partitionplates, as shown in Figs. 1, 2, and 3. Each of the-said mold-plates is provided on one side with a spacer and core-former 7, which bears against the next adjacent mold-plate. Hence the mold-plates are appropriately spaced apart.

The concrete or other material in a plastic condition is putin the mold-chambers formed 6;

the mold-plates, and the inner faces of theA block or sides of the opening, recess, or core therein* are formed by the spacer and coreformer 7, as will be understood. After the blocks have been molded and have become sufficiently hard they may be readily removed from the mold-box, together with the partition-plates and mold-plates.

`In Figs. 1 to 4 of the drawings the spacers and core-formers are disposed on the mold- .plates with their horizontal intermediate portions lowermost and their vertical or leg portions extending upwardly therefrom, thus causing the blocks to be molded with the intermediate portions Klowermost and their end y or leg portions extending upwardly.

In Fig. 5 I show a modification in which 'the spacers and core-formers 8 have their horizontal intermediate portions uppermost and their vertical leg portions extending downwardly therefrom. A

In Figs. 6, 7, 8, and 9 I show another modied construction, which I will ndw describe. The sides 10 of the mold-box are supported on sills 11, which are appropriately spaced apart. Cross-bars 12 are :secured on and connect the sills and are secured together at their corners by suitable means, here shown as angle-irons 13 and bolts 14. The bars 12 form the bottom pieces of the mold-box, and the mold-plates l5 rest thereon. Each of the mold-plates is provided on one side with' a spacer and core-former` 16, which have their horizontal intermediate portions uppermost and their verticalleg portions 4extendingdownwardly. In the angles between the horizontal and vertical or leg portions of the spacers and'core-formers are the beveled or IOC IIO

inclined portions 1 7. The lower end of the leg or vertical portions of the spacers and core-formers engage grooveslS in the upper sides of the bottom bars 12, as shown in Fig.

'Ytion will be readily understood Without requring a more extended explanation.

Various changes in the form, proportion,

and the minor details of construction .maybe resorted to without departing from 'the prin- ,--ciple or sacrificing any of the advantages of the invention as defined by the appended.

claims.

Having thus described my invention, what IV claim as new, and desire to secure by Letteursv Patent, is-

1. A mold-box having removable moldplates, each' provided on one side With a flange projecting laterally therefrom, extending to one edge thereof vand forming a spacer and core-former, substantially as described.

2.' In combination with a mold-box having a longitudinally-grooved bottom, removable mold-plates, each provided on one side with a spacer and core-former extending to end proj ecting from the bottom edge thereof, said projecting spacers of themoldlates entering the grooves in the bottom o the box, for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing ndtnes'ses.

FRANK MCMURRAY SAWYER.

`Witnessesi F. C. JACOBS, A. H. FISHER. 

